Description
Kubotai Rasbora (Rasbora kubotai)
📌 Basic Info
Scientific Name: Rasbora kubotai
Common Names: Kubotai Rasbora, Blue Rasbora, Dwarf Rasbora
Family: Cyprinidae (Rasboras)
Order: Cypriniformes
Origin: Southeast Asia — rivers and streams of Thailand and Malaysia
Size: Up to 1.5 inches (4 cm) in captivity
Lifespan: 3 – 5 years
Tank Zone: Mid-level dweller; peaceful schooling fish
🌊 Water Parameters
TDS: 50 – 150 ppm
pH: 6.0 – 7.0
Temperature: 22 – 28°C (72 – 82°F)
Hardness: 2 – 12 dGH
🐟 Characteristics
Body: Tiny, slender fish with iridescent blue-green body, slightly transparent fins, and a faint horizontal stripe; males display brighter coloration.
Behavior: Peaceful, active, and social; thrives in schools of 6 or more.
Swimming Style: Constant mid-level swimmer; energetic and lively in groups.
Unique Feature: Small size and vibrant metallic blue sheen make it a highly decorative nano-fish.
Nature: Gentle, hardy for its size, and perfect for planted aquariums or community nano tanks.
🍽️ Food
Type: Omnivorous
Diet: Micro flakes, finely crushed pellets, live/frozen foods (daphnia, microworms, baby brine shrimp)
Feeding: 1–2 times daily in small amounts
Tip: Ensure food is small enough for tiny mouths; feed in groups to reduce competition
🛠️ Maintenance
Tank Size: Minimum 10 gallons (38 L) for a small school
Filtration: Gentle filtration; well-oxygenated water
Decor: Planted aquarium with floating plants, open swimming areas, and smooth substrate
Lighting: Low to moderate; highlights metallic coloration
Water Change: 20–25% weekly for stable and clean water
👥 Social Behavior
Minimum Group Size: 6 or more (shoaling species)
Tank Mates: Other small, peaceful fish — ember tetras, pygmy corydoras, chili rasboras
Avoid: Larger, aggressive, or territorial fish
✅ Do’s
Keep in groups to encourage natural shoaling behavior
Provide planted areas with open swimming space
Maintain stable, clean water conditions
Offer a varied micro-sized diet to enhance coloration
❌ Don’ts
Don’t keep alone — will become stressed
Don’t house with large or aggressive species
Don’t neglect water changes or water quality
⭐ Quick Tips
The Kubotai Rasbora is a peaceful, miniature, and brilliantly colored schooling fish, ideal for nano aquariums and community tanks.
Best kept in groups of 6 or more, it exhibits active shoaling behavior and adds a vibrant metallic blue shimmer to planted aquariums.
Perfect for aquarists seeking a tiny, hardy, and visually striking freshwater fish.
